If you check over at http://www.gog.com/ today you can get the original Mount & Blade for free. Scroll down on the main page until you see the banner, make sure you're logged in. This version of Mount & Blade is the old one and it only got a singleplayer mode and some other things missing that are in Warband but I believe you could have a lot of fun with it anyway.

If you scroll down below the M&B banner you can also collect stamps, collect 7 of them and the Witcher 2 will be yours. A bit more work to recieve this one but I think it definitely will be worth it.